Advertisements
Advertisements
प्रश्न
Explain and give reasons why aluminium vessels should not be cleaned with powders containing alkalis ?
उत्तर
Aluminium vessels should not be cleaned with powders containing alkalis because aluminium reacts with alkalis to produce meta aluminate.
APPEARS IN
संबंधित प्रश्न
State the main components of the following alloys:
Duralumin
State two conditions necessary for rusting of iron ?
Name the following :
Ore of iron referred to as "fool's gold".
Name the following:
Two metals which occur in nature in free state as well as in combined state.
Name one metal occurring as a : Carbonate ore
Give composition and uses of the following alloys. Mention the reason for its use.
Brass
Complete and balance the following equation:
Fe2O3 + → Al2O3 +
From the metals copper, iron, magnesium, sodium and zinc, select a different metal in each case which:
(a) Does not react with dilute hydrochloric acid
(b) Can form 2+ and 3+ ions
(c) Has a hydroxide that reacts with both acid and alkalis.
(d) Does not react with cold water, but reacts with steam when heated.
Write the equation for the reaction of zinc with following: Dilute sulphuric acid
Name the following.
The property possessed by metals by which they can be beaten into sheets.
